adds round telemetry support

src/routes/api/events/servers/+server.ts

@@ -1,4 +1,5 @@
 import { subscribe } from '$lib/server/pipeline/bus.js';
+import { listTelemetry } from '$lib/server/fleet/telemetry.js';
 
 const encoder = new TextEncoder();
 const HEARTBEAT_MS = 20_000;
@@ -10,11 +11,12 @@ export async function GET() {
     const stream = new ReadableStream<Uint8Array>({
         start(controller) {
             unsubscribe = subscribe((event) => {
-                if (event.type === 'server-status') {
-                    controller.enqueue(encoder.encode(`event: server-status\ndata: ${JSON.stringify(event)}\n\n`));
+                if (event.type === 'server-status' || event.type === 'server-telemetry') {
+                    controller.enqueue(encoder.encode(`event: ${event.type}\ndata: ${JSON.stringify(event)}\n\n`));
                 }
             });
             controller.enqueue(encoder.encode(': hello\n\n'));
+            controller.enqueue(encoder.encode(`event: server-telemetry\ndata: ${JSON.stringify({ entries: listTelemetry(), snapshot: true })}\n\n`));
             heartbeat = setInterval(() => controller.enqueue(encoder.encode(': ping\n\n')), HEARTBEAT_MS);
         },
         cancel() {

src/routes/api/telemetry/+server.ts

@@ -0,0 +1,29 @@
+import { json } from '@sveltejs/kit';
+import { getServer } from '$lib/server/fleet/servers.js';
+import { saveTelemetry } from '$lib/server/fleet/telemetry.js';
+import { emit } from '$lib/server/pipeline/bus.js';
+
+export async function POST({ request }: { request: Request }) {
+    if (request.headers.get('content-type')?.split(';')[0].trim().toLowerCase() !== 'application/json') {
+        return json({ ok: false, error: 'Content-Type must be application/json' }, { status: 415 });
+    }
+    const body = await request.json().catch(() => null);
+    if (!body || typeof body !== 'object' || Array.isArray(body)
+        || body.event !== 'round_change'
+        || typeof body.server !== 'string' || !body.server.length || body.server.length > 255
+        || !Number.isSafeInteger(body.round) || body.round < 0
+        || !Number.isSafeInteger(body.players) || body.players < 0) {
+        return json({ ok: false, error: 'Expected round_change, a server name, and nonnegative integer round and players' }, { status: 400 });
+    }
+    const server = getServer(body.server);
+    if (!server || server.destroyed_at) {
+        return json({ ok: false, error: 'Unknown or destroyed server' }, { status: 404 });
+    }
+    const telemetry = {
+        server: body.server as string, round: body.round as number,
+        players: body.players as number, receivedAt: new Date().toISOString()
+    };
+    saveTelemetry(telemetry);
+    emit({ type: 'server-telemetry', entries: [telemetry] });
+    return json({ ok: true, telemetry });
+}

src/routes/servers/[name]/+page.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+    import RoundTelemetry from '$ui/components/RoundTelemetry.svelte';
     import { onMount, onDestroy } from 'svelte';
     import { page } from '$app/stores';
     import { goto } from '$app/navigation';
@@ -304,6 +305,8 @@
                 {/if}
             </div>
 
+            <RoundTelemetry {name} />
+
             {#if destroyError}
                 <div class="destroy-error" role="alert">{destroyError}</div>
             {/if}